Combined scaffold and derrick



c. c. YOUNG. CQMBINED'SCAF-FOLD A-ND DERRICK.

APPLICATION FILED MAR/26 I919.

Patented July 20, 1920.

3 SHEETS-SHEET I.

. 1 1 I v x C. C. YOUNG. COMBINED SCAFFOLD AND DERRICK.

APPLICATI ON FILED MAR. 26. 1919.

Patented July 20, 1920;

3 SHEETS-SHEET 2.

4, a 6. 2 .m a N fl/ J V 5a NM 7 fpl C. C. YOUNG.

' COMBINED SCAFFOLD AND DERRICK.

APPLICATION FILED MAR. 26, 1919.

1,347,480. Patented July 20,1920.

3 SHEETS--SHEET 3.

6% i 1l-- a? a. {I Wfi I K 2/ 9 (55 I J9 Mimi" (35 J7 N K7 g 5/ 13 0:3 I A 3 J5 n7 1 I l 1 J d7 Jfl-en w" 7a UNITED STATES CARL C. YOUNG, OERUSHVILLE, ILLINOIS.

COMBINED SGAFFOLD AND DERRICK.

Application filed March 26, 1919.

To all whom it may concern:

Be it known that I, CARL C. YOUNG, a citizen of the United States, residing at l'iushville, in the county of Schuyler and State of Illinois, have invented certain new and useful improvements in Combined Scaffolds and Derricks, of which the following is a specification.

This invention is a combined scaffold and derrickfor use by masons and similar artisans and is intended more particularly for use in building circular silos. The inven tion comprehends the provision of means forsupporting a platform within the space defined by the walls of the silo and raising the platform as the height of the silo increases; it also comprehends the provision of a derrick'o r hoisting mechanism which may be likewise raised as the silo rises in height and which will furnish means for hoisting the blocks or stones of which the silo wall is built. The invention also comprehends means'for bracing the platform within the silo and seeks to provide an apparatus for the stated purpose which will be inexpensive and may be eas1ly manipulated.

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a view in elevation of an apparatus embodying the improvements and showing the position of the same relative to a partly finished silo;

Fig. 2 is a perspectiveview of an anchor block which-is employed in the practical operation of the invention;

Fig. 3 a detail section of the anchor block;

Fig. 4 is a detail section on the line 4-4 of Fig. 1;

Fig. 5 is a view partly in plan and partly in horizontal section on the line 5--5 of Fig. 1;

Fig. 6 is a view showing the platform support in plan and showing the central mast and support in horizontal section;

Fig. 7 is a view, partly in elevation and partly broken away, of the central mast and the parts mounted directly thereon;

Fig. 8 isa perspective view of'one of the platform supports and braces;

Fig. 9 is an enlarged detail vertical section of a portion of the derrick support;

Fig. 10 is a detail elevation of a portion of the mechanism for raising the platform and derrick; 1

Specification of Letters Patent.

Patentedv July 20, 1920.

Serial No. 285,330.

Fig. 11 is a detail perspective View of the vertically movable frame or carrier.

In carrying out my invention, I employ an anchor block 1 which may be of any desired or convenient dimensions and will preferably have an angular vertical bore, indicated at 2. Having selected the site for the silo, the anchor block is firmly embedded n the ground at the center of the selected location, and a cap plate 3 is fitted in the upper end of the anchor block, the said cap plate being provided with a central pin 4 which may be engaged by any suitable tool or means for describing a circle thereabout. For instance, an extensible rod or bar may be pivotally engaged at one end over the said pin and at its other end provided with any form of tooth or cutter which will penetrate the ground sufiiciently to mark off the location of the silo foundation when the bar or rod is swung pivotally about the pin t. The same or similar means may be employed to bring the upper surface of the foundation to the desired level smooth condition after the foundation trench has been filled and while the foundation is setting. After the foundation has been formed and sufliciently set, the cap plate is removed from the anchor block and a mast 5 has its lower end fitted in the block so as to rise vertically therefrom, as shown in Fig. 7. This mast will be preferably a pole of angular cross section which will fit closely within the angular bore 2 of the anchor block so that it will be prevented from having relative turning movement and it will be constructed in sections which may be spliced together, as shown at 8, as the silo rises so that the platform and derrick or hoisting mechanism may be raised as the work progresses and the workmen supported within the silo at a proper height for conveniently performing the operation of setting the blocks or stones and raising them to their positions. The mast will obviously be located at the center of the silo and the platform which will be mounted thereon will, therefore, serve partly as a gage to determine whether the wall is plumb and thereby facilitate the building operation.

Fitted about the mast is a frame comprising an upper tubular portion 9, a lower ably circular in their exterior outlines and the lower member 10 is provided near its upper extremity with an annular groove 12, the function of which .will presently appear, and near the lower extremity of said member 1s a s1m1lar groove 13. Secured upon the exterior surface of this lower tu-' bular member are bands 14L which are provided with vertically disposed slots 15, the slots in the lower hand registering with the groove 13 and the slots in the upper band registering with the annular groove 12, the width of said groove 12 being greater than the length of the slots whereby the upper hand will extend over the upper portion of the groove, as clearly shown in Fig. 7. The lower tubular member 10 and the bands 1e mounted thereon carry the platformsupports which may be of any desired number, eight being illustrated in the accompanying drawings. These platform supports consist each of an upper beam 16, a lower beam or foot-bar 17 and vertical and oblique braces 18 and 19 extending between the members 16 and 17. The beams 16 and the baseor foot-piece 17 each consists of a pair of spaced bars having the ends of the braces secured rigidly between them with the vertical braces spaced from the inner extremities ofthe said members. Blocks 20 are secured between the members of the beams and of the bases and project inwardly beyond the same to provide tenons or tongues 21 which are adapted to enter the several slots 15 and the groove 13 or the groove 12 as the case may be. On the upperside of the upper block 20, I secure a retaining member 22 provided at its inner end with a lip or hook 223 which is adapted to engage behind the overhanging portion of the upper band ll; and thereby prevent the platform-supporting member from falling outwardly from the member 10. To mount the platform sup ports in position, the supports are tilted slightly so that the lip or hook'23 may be passed through the slot 15 into-the groove 12, after which the support is swung clownwardly so that'the tenons 01' tongues 21 will enter the respective slots as will be readily understood. The tenons or tongues should be of such dimensions that they will fit closely within the slots 15 so that vertical or lateral movement of the platform supports will be prevented, while, as stated and as will be readily'understood, outward movement of the said supports will be'prevented by the engagement of the lips or hooks 23 behind the upper band 14:. The platform supports will extend radially from the tubu lar member 10 andboards are to be placed 7 upon the-supports so as to extend across the same as will be readily understood. The

alternate floor supports are utilized as braces and to this end they areprovidedwith levers 24 which are each pivotedat its inner end between the outer extremities of theparts of the respective base 17 and the said inner extremities'of the levers are beveled, as shown most clearly in Fig. 1, whereby theywill fit against the outer edges of the inclined braces mediate point of the length of each lever brace 24, I pivotally attach the lower end of a locking bar 25 which extends upwardly betweenthe parts of the beam 16 and is provided with a longitudinal series of openings 26 through any one of which a pin or bolt 27 may be insertedto secure the bar to the said beam 16. By varying the angular position of the lever brace it may be adjusted to silos of differentdiameters so that a single set of platform supports may be used for silos of various dimensions. A filler 28 is secured between the parts of the beams 16 at the outer side of the locking bar 25 which plays between the said filler and the upper end of the brace 19, as shown, and between the outer extremities of the beam 16 I pivot a tongue or extension 29 which'has its inner end beveled to engage against a correspond ingly beveled surface of the filler so that downward movement of the said tongue or extension will be prevented. By providing a plurality of these extensions which differ in length the beams 16 maybe made to carry platforms of various sizes according to thediameter of the silo under construc tion. The extensions or-tongues 29will terminate short of the silo wall, as shown in- Fig. 1, so that themasonwill not be hampered in setting the stones or blocks and may apply his tools to all corners and surfaces thereof without inconvenience or any liability to be precipitated to the bottom of the silo..

At an intermediate point'of the bars 11, openings are provided therethrough to receive a bolt 30 which passes through the mast and thereby serves'to hold the plat form supporting structure against vertical movement so that dropping of the platform andits'support'will be prevented. It will be understood, ofcourse, that the mast will 7 be providedwithopenings at intervals along itsheight or length to receive the bolt 01' pin 30 so that'the supporting structure may be secured to the mast at the proper point as the progress of the work necessitates.

The upper tubular member 9 constitutes said grooves, the heads being preferably square in plan View and connected by bolts 33 extended through their corners so that the heads may rotate together and will always be in the same relative position. The lower head is provided with projecting sills 34: upon which are piyotally mounted the standards 35 of the derrick, the said standards converging upwardly and outwardly and being held in any desired adjusted position relative to the upper tubular supporting member 9 by a cable or similar brace 36 secured to and extending between the upper head and a cross-bar 37 near the upper ends of the standards as will be readily understood. A derrick beam 38 extends outwardly from the upper ends of the standards 35 and braces 39 are secured to the said beam and the standards 35 so as to impart the necessary rigidity to the structure. At the outer extremity of the beam 38 is an eye or anchor 39 to which the end of the hoisting cable a0 is secured and on the under side of the beam are pulleys l1 over which the cable runs, that portion of the cable between the anchor 39 and the outermost pulley ll carrying a block and tackle 4:2 which is to be engaged in or con nected with the stone or building block to raise the same to the position where it may be set by the mason. From the inner guide to a drum or Windlass 43 carried by and mounted between the standards 35 near the lower ends of the same and on one end of the windlass shaft 44 is a sprocket 45. A chain 46 is trained around the said sprocket and the inner member of double sprocket t? while a chain 48 is trained around the outer member of said double sprocket and a larger sprocket 49 secured on a shaft mounted in a suitable bearing in a sill 3-4 and provided with an operating handle 50.

The bore of the member 9 is cruciform' in outline thereby providing spaces 51 at the sides of the mast 5 to accommodate cables 52 each of which is secured at one end to a rod 53 carried by projections 54 on the side bars 11 of the slidable support. From the rod 53, the cables pass upwardly to guide pulleys 55 which are rotatably mounted in a casing 56 disposed above the supporting member 9 and of such form that it may fit readily around the mast and slide thereon when it is to be adjusted. After passing over the guide pulleys 55, the cables 52 extend downwardly through the member 9 and between the same and the mast to a guide roller 57 mounted on the under side of projections 58 disposed in the same horizontal plane as the projections 54, but at the opposite side of the mast, and on the upper sides of said projections I mount a drum or Windlass 59, the shaft of which is provided with cranks or operating handles 60 at its ends. A pin or bolt 61 is inserted throughthe casing 56 and openings provided therefor in the mast so that the pulleys will be supported above the derrick-carrying member and will be prevented from dropping as will be understood.

It is thought the use of the apparatus will be readily understood. After the foundation for the silo has been formed and has sufficiently set, the lowermost section of the mast, or two sections of the same spliced together, if desired, is set up by engaging the lower end thereof in the anchor block, as previously stated. The derrick and platform carrier is fitted over the mast and the pulley'casing secured to the mast above said carrier. The platform supports being engaged in the bands 14: and the platform boards laid on said supports, the derrick is properly adjusted and the device is ready for use. TV hen the wall of the silo has risen to a point where the mason cannot reach the upper course to be laid, the pin 30 is withdrawn-and the Windlass 59 operated to wind the cables 52 thereon. An upward pull will be consequently exerted through the cables and the rod 53 upon the derrick and platform carrier so that the same will be caused to move vertically upward upon the mast and this vertical movement may continue 1 until the platform has been brought to the pulley 41 the cable 10 extends downwardly level of the finished wall or the upper extremity of the derrick-supporting member 9 reaches the casing 56. In the latter event, the casing 56 is adjusted to a higher point in the mast, the derrick and platform carrier being prevented from dropping by the replacement of the bolt or pin 30. As the work progresses additional sections may be spliced to the mast and this operation will be repeated until the silo has reached the desired height. To prevent sagging or bending of the mast as the platform and the derrick approach the upper end thereof, I provide blocks 62, indicated in dotted lines in Fig. 1, which are clamped at intervals about the mast below the platform supports as said supports are brought to successive higher levels and to the said blocks I secure braces 63 likewise shown in dotted lines which extend outwardly and slightly upwardly to engage against the inner surface of the completed silo wall below the platform supports, thereby bracing the mast and maintaining the true vertical position of the same. When the platform is to be raised, the locking levers 24 are released from the wall of the silo by exerting an upward pull upon the locking bars 25, the pins 27 being temporarily withdrawn, and it will be understood that in placing the platform boards upon the scaffold or platform supports they may be laid so that the ends of the locking bars will be readily accessible. When the silo has reached the desired lOO height, the derrick will be drawn inwardly by shortening the connecting brace 36 so that the standards 35 will be swung close to the mast and the beam 88 drawn within the silo. The derrick may then be lowered with? in the silo and this lowering operation is accomplished by reversing the steps performed to raise the derrick and platform as the silo was built, the blocks 62 and braces 63 being removed as they are successively met by the descending platform supports and the several sections of the mast being disjointed and taken down as the lower levels are reached.

It will .be readily noted from the foregoing description, taken in connection with the accompanying drawings, that I have provided an apparatus of inexpensive construction which will support the workmen within the silo where they may perform their. labors most conveniently and advantageously. The position of the scaffold and the derrick may be easily shifted as the work progresses so that the workmen will follow the progress of the work without trouble and inconvenience. The derrick beam will be so adjusted that the building blocks or stones will be hoisted just outside the wall of the silo and will be so supported that the mason will be required merely to guide them into their proper places.

lower tongues to engage in said sockets and upstanding hooks on the upper tongues to engage behind said overhanging lips.

2. An apparatus for the purpose set forth comprising a mast, a carrier mounted for vertical movement thereon, and scaffold supports detachably engaged in the carrier and radiating therefrom, some of said supports being provided with lever braces pivotally attached to their lower portions, and looking bars pivoted to saidbraces and adjust- :zbly secured to the upper members of the scaffold supports.

3. Anapparatus forthe purpose set forth comprising a mast, a carrier mounted thereon for vertical movement and provided with annular grooves,.heads fitted in said grooves for rotary movement about the carrier, connections between the heads whereby they will be relatively fixed,a derrick carried by the lower of said heads, means on said head for operating the derrick and an adjustable connection between the upper head and the derrick.

4. An apparatus for the purpose set forth comprising a mast of angular cross-section, a carrier mounted upon the mast for vertical movement and having a bore of cruciform cross section whereby portions thereof will be spaced from the sides of the mast, a guide adjustably secured to the mast above the carrier, a cable passing around said guide and through the carrier at the side of the mast, one end of said cable being fixed to the carrier, and means on the carrier attached to the opposite end of the cable for winding 01' unwinding the same; r

In testimony whereof I affix my signature.

CARL o. YOUNG. [11. 8.] 

